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28 August 2008 Photochemical nano-scale patterning with Rhodamine 6G dye from aqueous phase
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Surface relief gratings produced on planar substrates have been widely investigated for their application as a holographic recording medium. Much of this work has concentrated on gratings made in polymer thin films with an azo-benzene group. We describe a novel phenomenon involving surface relief gratings which are formed by deposition of Rhodamine 6G dye on polybutadiene thin film. This deposition as a grating pattern is photo-induced in a dye-solution by holographic interference of low power 488 nm light from an argon-ion laser. Dynamics of this aqueousphase grating deposition is investigated for various concentrations of the dye. A plausible mechanism of grating formation involves photochemical reaction of polybutadiene substrate with the laser-excited dye. Surface relief structure of the grating is characterized with an atomic force microscope.
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Aschalew Kassu, Fernando A. Calzzani Jr., Jean M. Taguenang, Redahegn K. Sileshi, and Anup Sharma "Photochemical nano-scale patterning with Rhodamine 6G dye from aqueous phase", Proc. SPIE 7033, Plasmonics: Nanoimaging, Nanofabrication, and Their Applications IV, 703306 (28 August 2008);

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